How to disable or power off a GPIO (GPIO_EMC_03)?

[BlackTurbo]

Hi, I'm using RT1062 as a GUI processor, and my application requires a NAND flash connected to RT1062 and a C8051F uC in the same time. The strange thing is one of the 8 data lines, GPIO_EMC_03, can't work when I using C8051F to write/read the NAND flash, unless the RT1062 been powered off. Using ONOFF to force the RT1062 shutdown can also eliminate the error but it seems not a good idea. 

So I want to disable or power off this single GPIO (GPIO_EMC_03) from RT1062 code, how can I do that? I've tried to config the GPIO using PAD resister but without success.

Thanks. 

@jeremyzhou 

[FelipeGarcia]

Hi,

Unfortunately, is not possible to power off single GPIO pin in code, maybe you can add an external IC to do this in HW.

Best regards,

Felipe

[BlackTurbo]

Thanks.

Then is there a method to block a group of the GPIO not just the single one? I've also tried to config the issued GPIO as Hi-Z mode but it didn't work, I'm thinking maybe my configuration is not right, could you tell me how to make a GPIO Hi-Z for iMXRT1062?

[FelipeGarcia]

Hi,

GPIO does not have Hi-Z mode, only open drain.

Regards,

Felipe